As you can see, in normal societies, relationship between parent-children is 0.5, 0.25 for between grandparent and grandchildren, 0.5 for between full siblings and 0.25 for half-siblings. In an incest case, the Fritzl case, the relationship between Josef Fritzl and Elisabeth Fritzl’s children is 0.75, and the relationship between Elisabeth Fritzl’s children is 0.625.

Well, here is another pedigree, you may dare to work out the relationship by yourself. good luck!!

AND you may be interested in shoot the relationship matrix of British Royal Family (click it to enlarge or check out the pdf version)